package com.sky.handler;

import com.sky.constant.MessageConstant;
import com.sky.exception.BaseException;
import com.sky.result.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.sql.SQLIntegrityConstraintViolationException;

/**
 * 全局异常处理器，处理项目中抛出的业务异常
 */
@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler {

    /**
     * 捕获业务异常
     * @param ex
     * @return
     */
    @ExceptionHandler
    public Result<String> exceptionHandler(BaseException ex) {
        log.error("异常信息：{}", ex.getMessage());
        return Result.error(ex.getMessage());
    }


    /**
     * 处理SQL异常，重复注册同一用户
     * @param exception
     * @return
     */
    @ExceptionHandler
    public Result<String> exception(SQLIntegrityConstraintViolationException exception) {
        // 获取异常信息
        String exceptionMessage = exception.getMessage();
        // 定位具体的异常
        if (exceptionMessage.contains("Duplicate entry")) {
            // 获取发送异常的用户
            String[] split = exceptionMessage.split(" ");
            String userName = split[2];
            // 拼接返回数据
            String msg = userName + MessageConstant.ALREADY_EXISTS;
            return Result.error(msg);
        } else {
            return Result.error(MessageConstant.UNKNOWN_ERROR);
        }

    }
}
